Mystery trains between Dundee and Aberdeen in RTT

[timj]

Hi

I've printed out the day's times (0600 to 2000) at Arbroath for Tues 7th August as an example as I'm staying there next week. However there's some mystery services just running from Dundee to Aberdeen that are indicated as loco-hauled 2W41, 2W80 and similar and they have (Q) beside them.
Any explanation? Is this something I can ride on?

 

[Kite159]

HST training runs?

 

[timj]

Yes, you could be right - some of them are labelled as HST's, just the first one I looked at said Diesel Loco so I assumed they were all the same. That makes sense.

What's the (Q) meant to mean I cannot find a help page on RTT?

 

[The Planner]

Runs as required.

 

[Esker-pades]

They are HST training runs. Similar services run Haymarket-Dundee and on the Highland Main Line.

You cannot ride on them. They are unadvertised to the public.